Beckman Coulter Inc. sent an Urgent Product Correction letter dated May 28, 2013 to affected customers. The letter identified the affected product, the issue, impact, actions to be taken, and resolution. The letter instructed customers to discontinue use of the affected product and request a replacement product. For questions contact Customer Support Center (Call Center) on the Beckman Coulter website at http://www.beckmancoulter.com/customersupport/support/ or call 800-854-3633 in the United States and Canada. Outside the United States or Canada, contact your local Beckman Coulter Representative.